Since OX App Suite 7.8.0 it is possible to have a banner on top of the application.
Please Note: This functionality is only supported with v7.8.x.
By default the banner is disabled, to use it edit
/opt/open-xchange/etc/settings/appsuite.properties and add:
To change the default values you have to add them to
default: host: all bannerCompany: 'mycompany' bannerProductName: 'myproductname' bannerHeight: 60
note: the leading spaces are important in a .yml file.
This would enable and change the company/product name for all hosts/users. A more fine grained configuration is possible via the configcascade.